View previous topic :: View next topic |
Author |
Message |
Victor
Joined: 29 Sep 2005 Posts: 207 Location: NI
|
Posted: Mon Apr 28, 2008 10:10 am Post subject: SFX |
|
|
These days when I go on trips I run off a few puzzles for use in spare minutes, instead of the paperbacks that used to accompany me. I haven't solved them all this time, but managed to do this (non-trivial) one, M3981695 (32). Code: |
+---------------------+--------------+----------------+
| 5 2389 1289 | 7 18 29 | 6 2349 349 |
| 16 29 4 | 15 3 156 | 8 29 7 |
| 7 2389 2689 | 29 68 4 | 1 5 39 |
+---------------------+--------------+----------------+
| 3 1 7 | 25 4 25 | 9 8 6 |
| 48 6 58 | 13 9 13 | 45 7 2 |
| 249 2459 259 | 6 7 8 | 3 14 145 |
+---------------------+--------------+----------------+
| 124689 24589 125689 | 1349 16 1369 | 7 13469 13459 |
| 1469 7 3 | 8 5 169 | 2 1469 149 |
| 1469 459 1569 | 1349 2 7 | 45 13469 8 |
+---------------------+--------------+----------------+
|
Play this puzzle online |
|
Back to top |
|
|
ravel
Joined: 21 Apr 2006 Posts: 536
|
Posted: Mon Apr 28, 2008 11:41 am Post subject: |
|
|
Nice,
finned x-wing (grouped skyscraper), xy-wing, a couple of kite/skyscrapers, and a M-wing for both numbers (not in this order). |
|
Back to top |
|
|
Asellus
Joined: 05 Jun 2007 Posts: 865 Location: Sonoma County, CA, USA
|
Posted: Mon Apr 28, 2008 10:39 pm Post subject: |
|
|
There's a nice Sashimi Swordfish right at the start that eliminates <4> in r5c1 and moves things along. |
|
Back to top |
|
|
storm_norm
Joined: 18 Oct 2007 Posts: 1741
|
Posted: Mon Apr 28, 2008 11:11 pm Post subject: |
|
|
Code: | .---------------------.---------------------.---------------------.
| 5 2389 1289 | 7 18 29 | 6 2349 349 |
| 16 29 4 | 15 3 156 | 8 29 7 |
| 7 2389 2689 | 29 68 4 | 1 5 39 |
:---------------------+---------------------+---------------------:
| 3 1 7 | 25 4 25 | 9 8 6 |
| 48 6 58 |#13 9 #13 | 45 7 2 |
| 249 2459 259 | 6 7 8 | 3 14 145 |
:---------------------+---------------------+---------------------:
| 2489 24589 12689 |#1349 16 #1369 | 7 13469 13459 |
| 1469 7 3 | 8 5 169 | 2 1469 149 |
| 1469 459 1569 | 1349 2 7 | 45 13469 8 |
'---------------------'---------------------'---------------------' |
I have a question...
the cells marked form what I think is a UR, but it doesn't eliminate two candidates, it only eliminates one... hmm. I think its been discussed before that you can have two sides of the UR be conjugate on one of the candidates and therefore it will only eliminate one of the "floor" candidates?
in this case, the candidate that is conjugate on two sides is 3
is this the case always?? |
|
Back to top |
|
|
Victor
Joined: 29 Sep 2005 Posts: 207 Location: NI
|
Posted: Tue Apr 29, 2008 8:33 am Post subject: |
|
|
I know types 1 - 4 automatically, but think about others on a need-to-know basis. I.e. I recognise the easy ones without thought, but just mentally figure out others as needed. It's usually the case (and of course always is in this kind) that the number you can eliminate is the one that doesn't have the strong link, and it'll be on the opposite side.
Here, you can eliminate the 1 form the bottom left cell. Trye it mentally: run round the 4 cells clockwise. If that's a 1, then next is 3, then next is 1 and, punchline, bottom right must be 3 because of the strong link.
Hope that helps.
PS one rule I find helpful in UR situations is as follows:
If there are 2 naked pairs, then you need one (more) conjugate link to be able to make an elimination.
If there's just one naked pair, then you need 2 conjugate links.
If there are no naked prs, then you need 3 conjugate links.
Not that these are necessary, but may not always be sufficient. |
|
Back to top |
|
|
ravel
Joined: 21 Apr 2006 Posts: 536
|
Posted: Tue Apr 29, 2008 1:08 pm Post subject: |
|
|
Asellus wrote: | There's a nice Sashimi Swordfish right at the start that eliminates <4> in r5c1 and moves things along. | Nice find, its also a grouped kite:
Code: | +---------------------+--------------+----------------+
| 5 2389 1289 | 7 18 29 | 6 2349 349 |
| 16 29 4 | 15 3 156 | 8 29 7 |
| 7 2389 2689 | 29 68 4 | 1 5 39 |
+---------------------+--------------+----------------+
| 3 1 7 | 25 4 25 | 9 8 6 |
|-48 6 58 | 13 9 13 |#45 7 2 |
| 249 2459 259 | 6 7 8 | 3 14 145 |
+---------------------+--------------+----------------+
| 124689 24589 125689 | 1349 16 1369 | 7 13469 13459 |
|@1469 7 3 | 8 5 169 | 2 @1469 @149 |
| 1469 459 1569 | 1349 2 7 |#45 13469 8 |
+---------------------+--------------+----------------+
|
|
|
Back to top |
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|